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Primatology helps anthropologists make inferences about the early social organization of hominids and untangle issues of human nature and the origins of culture. Of particular relevance to humans are two kinds of primates:

those whose ecological adaptations are similar to our own (terrestrial monkeys and apes), and those most closely related to us—the great apes, specifically the chimpanzees and gorillas.

Which of the following is an example of an analogy?

D. dolphin fins and fish fins

What is the term for a trait that organisms have jointly inherited from a common ancestor?

Homology

For years, orangutans were believed to be the only great ape that lived a largely solitary life foraging for hard-to-find fruit thinly distributed over a large area, but primatologists have now turned this theory on its head. For example, van Schaik's work among orangutans living in Suaq, a swamp forest in Sumatra, has found that

not only can orangutans be very sociable animals, but they have the capacity to transmit the capacity culturally for tool use.

Common ancestry isn't the only reason for similarities between species. Similar traits can also arise if species experience similar selective forces and adapt to them in similar ways. This process is known as

convergent evolution.

Of the following primates, which are most likely to provide reasonable comparisons to humans?